I have talked to the store where I bought the i7 and It is possible to switch this for a i5 2500K and get 74,28 EUR back.
Is there any reason to keep the i7? Im happy with how the computer handles BF3(heigh settings 50-80 fps avg 65 fps) and do not want it to perform worse.
I have also checked how much performance I will gain to get the GTX580 instead för 106 EUR but it seems to be a small bost, not even 20%. The GTX580 is about 24% more expensive then the GTX570 here in Sweden.
In gaming, you will see little difference between the 2500k and 2600k.
For price / performance, the 900 MHZ 560 Ti is simply untouchable.
Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game @ 1920 x 1200) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in US dollars per frame single card - CF or SLI: